bollens



UNITED STATES PATENT FFCE@ A. D. BOLLENS, OE NEVBURGH, NEW' YORK.

PLATE-HOLDER FOR PHOTOGRAPEIC CAREER/AS.

Specification of Letters Patent No. 20,401, dated June l, 1858.

To all whom it may concern.'

Be it known that i-:END D. BoLLnNs, oil Newburgh, in the county of @range and State of New York, have invented a new and useful Improvement in Plate-Holders for Photographie Cameras; and do hereby declare that the following is a full, clear, and exaet description of the same, reference being had to the accompanying drawings, forming a part ot this speeilication, iu which- Figure l is a front view otl the trame which receives the glass or other sensitively prepared plate. Eig. is a section ot the same. JFig. 3 is a front view ot one oit the sides of the trame.

Similar letters of reference indicate Corresponding parts in the several tigures.

rlhis invention consists in a novel method of constructing a continuous glass lining and titting and securing the same in the plate holder to form a seat for the glass or other plate, to prevent 'the chemicals with which said plate is prepared from coming in Contact with the wood or other material of which the frame is made and thereby Causing discoloration.

To enable others skilled in the art to make and use my invention, l will proceed to describe its construction and operation.

A, is the frame ot the plate-holder, represented as being ot wood made in Jiour pieces which are mitered together. a o l) l), is the Continuons glass lining ot the said trame, made in eight pieces, each piece consisting of a strip of sheet or window glass, l'our or said pieces a, a, being wider than the other four l), L, and one of the narrower pieces o, l), and one of the wider pieces a, a, being placed together tightly in a groove (l, cut to receive them in each side of the trame A, so that they combine to make a rabbetshaped seat c, c, all around the traine as shown best in E ig. 2, of a proper size to receive the photographie plate. The pieces a, o, and l, l), are mitered together at their ends, as shown in the corners ot Fig. l, to correspond with the mitering ot the trame "i: and by that means, when the sides of "he trame It are glued or otherwise secured together, the pieces hold one another securely in place in the grooves otthe trame. Each pair of pieces z l), is put into its respective side of the trame as shown in Fig.

before putting the sides together. i prefer to Cement together the two pieces a, constituting each side ot the tranie with some suitable adhesive material hetore inserting them but this is not absolutely neeeesary as it the pieces are all ot proper length and properly mitered, they cannot tail to confine each other when the sides ot the trame are put together.

The above construction ot the glass liuv ing ot the trame not only gives the advantage ot' a continuous bearing all around the edges of the plate, but makes the trame cheaper tnan when the solid glass corners are used, as there is some dil'liculty in casting the said corners, man v ot them llying and warping in the cooling and becomingl worthless; while the pieces a, a, and l), l), may be made of waste window glass, and consequently eos-t but little more than the expense ot cutting the Corners. llhe rednetion ot cost is not howevn so great an ad vantage as the additional se 'urity ot the lining, which cannot Jfall out of the trame, as the glass corners will do atter some use ot' the frame.

llThat l Claim as my invention. and desire to seeure by Letters Patent, is

The continuous glass lining u, a. l) l), of the. tramen Constructed and i'itted and secured iu the frame in the manner substantially as herein specilied.

REND D. BOLLENS. lWitnesses THOMAS M. Piron,

JOHN S. TIL-tren. 

